Drop support for Python 3.8

Author: tobiasdiez

.github/workflows/dist.yml

@@ -100,7 +100,7 @@ jobs:
       #
       CIBW_ARCHS: ${{ matrix.arch }}
       # https://cibuildwheel.readthedocs.io/en/stable/options/#requires-python
-      CIBW_PROJECT_REQUIRES_PYTHON: ">=3.8"
+      CIBW_PROJECT_REQUIRES_PYTHON: ">=3.9"
       # Environment during wheel build
       CIBW_ENVIRONMENT: "PATH=$(pwd)/local/bin:$PATH CPATH=$(pwd)/local/include:$CPATH LIBRARY_PATH=$(pwd)/local/lib:$LIBRARY_PATH PKG_CONFIG_PATH=$(pwd)/local/share/pkgconfig:$PKG_CONFIG_PATH ACLOCAL_PATH=/usr/share/aclocal"
       # Use 'build', not 'pip wheel'

.github/workflows/docker.yml

@@ -18,7 +18,6 @@ on:
         default: >-
           ["ubuntu-trusty-toolchain-gcc_9",
            "ubuntu-xenial-toolchain-gcc_9",
-           "ubuntu-bionic-gcc_8-python3.8",
            "ubuntu-focal",
            "ubuntu-jammy",
            "ubuntu-kinetic",
@@ -27,15 +26,11 @@ on:
            "debian-bullseye",
            "debian-bookworm",
            "debian-sid",
-           "linuxmint-19-gcc_8-python3.8",
-           "linuxmint-19.3-gcc_8-python3.8",
            "linuxmint-20.1",
            "linuxmint-20.2",
            "linuxmint-20.3",
            "linuxmint-21",
            "linuxmint-21.1",
-           "fedora-29-python3.8",
-           "fedora-30-python3.8",
            "fedora-31",
            "fedora-32",
            "fedora-33",

.github/workflows/lint.yml

@@ -17,7 +17,7 @@ jobs:
     - name: Set up Python
       uses: actions/setup-python@v4
       with:
-        python-version: 3.8
+        python-version: 3.9
     - name: Install pycodestyle
       run: pip install tox pycodestyle
     - name: Lint using pycodestyle
@@ -31,7 +31,7 @@ jobs:
     - name: Set up Python
       uses: actions/setup-python@v4
       with:
-        python-version: 3.8
+        python-version: 3.9
     - name: Install relint
       run: pip install tox relint
     - name: Lint using relint
@@ -45,7 +45,7 @@ jobs:
     - name: Set up Python
       uses: actions/setup-python@v4
       with:
-        python-version: 3.8
+        python-version: 3.9
     - name: Install tox
       run: pip install tox
     - name: Lint using tox -e rst

README.md

@@ -199,7 +199,7 @@ in the Installation Guide.
       more details.
 
     - Python 3.4 or later, or Python 2.7, a full installation including
-      `urllib`; but ideally version 3.8.x, 3.9.x, or 3.10.x, which
+      `urllib`; but ideally version 3.9.x, or 3.10.x, which
       will avoid having to build Sage's own copy of Python 3.
       See [build/pkgs/python3/SPKG.rst](build/pkgs/python3/SPKG.rst)
       for more details.